Cryptanalysis of a Certificateless Ring Signcryption Scheme
نویسندگان
چکیده
منابع مشابه
Cryptanalysis of a Certificateless Ring Signcryption Scheme
Certificateless public key cryptography (CL-PKC) is an appealing paradigm with the advantages of both conventional public key cryptosystem and ID-based cryptosystem because it avoids using certificates and eliminates the key escrow problem. Ring signcryption is an attractive primitive which allows one user to send a message anonymously, confidentially and authentically. Recently, Qi et al. prop...
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Signcryption can offer authentication and confidentiality simultaneously with better efficiency than traditional signature-then-encryption approach. Ring signature enables a user to conscribe arbitrarily a group of ring members and sign a message on behalf of the ring (which includes himself) without revealing his real identity. By integrating the notion of signcryption and ring signature, ring...
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In this paper, we propose a certificateless signcryption scheme from Weil pairings and give a practical security model. Compared with existing schemes, the new scheme is more efficient.
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It would be interesting if a signcryption scheme in the standard model could be made certificateless. One of the interesting attempts is due to Liu et al. [Z. Liu, Y. Hu, X. Zhang, H. Ma, Certificateless signcryption scheme in the standard model, Information Sciences 180 (3) (2010) 452-464]. In this paper, we provide a cryptanalysis on this scheme by depicting two kinds of subtle public key rep...
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Certificateless public key cryptography (CL-PKC) is a useful method in order to solve the problems of traditional public key infrastructure (i.e., large amount of computation, storage and communication costs for managing certificates) and ID-based public key cryptography (i.e., key escrow problem), simultaneously. A signcryption scheme is an important primitive in cryptographic protocols which ...
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ژورنال
عنوان ژورنال: International Journal of Security and Its Applications
سال: 2015
ISSN: 1738-9976,1738-9976
DOI: 10.14257/ijsia.2015.9.7.30